3M Speedglas FA III Supplied Air Respirator System with V-100 Valve, 3M Speedglas Welding Helmet 9100-Air with Side Windows and Auto-Darkening Filter 9100XXi is a supplied air (SA) respiratory system, which includes a V-100 Vortex air-cooling valve and complete 3M Speedglas Welding Helmet 9100-Air. But with improved optics, the 9100XXi ADF allows you to see colors in a more realistic and natural state, which can help welders complete certain jobs with greater precision.